scsi: cxgb4i: silence overflow warning in t4_uld_rx_handler()

Smatch marks skb->data as untrusted so it complains that there is a
potential overflow here:

	drivers/scsi/cxgbi/cxgb4i/cxgb4i.c:2111 t4_uld_rx_handler()
	error: buffer overflow 'cxgb4i_cplhandlers' 239 <= 255.

In this case, skb->data comes from the hardware or firmware so it's not
going to overflow unless there is a firmware bug.

[mkp: fixed braces]

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index 406e94312d4e9a49b0015e811f14b6a02b1177a8..211da1d5a8699d2b6732e8505fba918c57b61688 100644 (file)
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -2108,12 +2108,12 @@ static int t4_uld_rx_handler(void *handle, const __be64 *rsp,
        log_debug(1 << CXGBI_DBG_TOE,
                "cdev %p, opcode 0x%x(0x%x,0x%x), skb %p.\n",
                 cdev, opc, rpl->ot.opcode_tid, ntohl(rpl->ot.opcode_tid), skb);
-       if (cxgb4i_cplhandlers[opc])
-               cxgb4i_cplhandlers[opc](cdev, skb);
-       else {
+       if (opc >= ARRAY_SIZE(cxgb4i_cplhandlers) || !cxgb4i_cplhandlers[opc]) {
                pr_err("No handler for opcode 0x%x.\n", opc);
                __kfree_skb(skb);
-       }
+       } else
+               cxgb4i_cplhandlers[opc](cdev, skb);
+
        return 0;
 nomem:
        log_debug(1 << CXGBI_DBG_TOE, "OOM bailing out.\n");